#include <stdio.h>

// 常量的用途 主要用于赋值，运算
// 常用的表现形式 有两种 字面量 宏

// 常量是有类型
#define price 100.0

#define Pi 3.1415926

int main()
{
    int age = 30;
    age = age + 10;

    float salay = 1234.56;
    char sex = 'm';
    char name[] = "xiaoming";

    printf("sizeof(0) = %d sizeof(0.0) = %d\n",sizeof(0), sizeof(0.0));
        printf("sizeof(0) = %d sizeof(0.0) = %d\n",sizeof(0), sizeof(0.0f));
            printf("sizeof(0) = %d sizeof(0.0) = %d\n",sizeof(0), sizeof(0.0l));
    return 0;
}
